Small vehicle security unit



FIG. 1 is a front and left side perspective view of a small vehicle security unit showing my new design;

FIG. 2 is a top view of my design;

FIG. 3 is a left side view of my design;

FIG. 4 is a front view of my design;

FIG. 5 is a back view of my design;

FIG. 6 is a bottom view of my design; and,

FIG. 7 is a perspective view showing the back and right side of my design.

The broken lines shown in the FIG. 1 drawing view are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a small vehicle security unit, as shown and described. 